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Date: Thu, 20 Aug 2015 16:43:36 +0200
From: Jacek Anaszewski <j.anaszewski@...sung.com>
To: linux-leds@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Jacek Anaszewski <j.anaszewski@...sung.com>,
Ingi Kim <ingi2.kim@...sung.com>, Andrew Lunn <andrew@...n.ch>,
Sakari Ailus <sakari.ailus@...ux.intel.com>,
Pavel Machek <pavel@....cz>,
Stas Sergeev <stsp@...rs.sourceforge.net>
Subject: [PATCH/RFC v6 06/36] leds: Drivers shouldn't enforce SYNC/ASYNC
brightness setting
This patch removes brightness_set_sync op as well as SET_BRIGHTNESS_ASYNC
and SET_BRIGHTNESS sync flags. led_set_brightness now calls
led_set_brightness_nosleep rather then choosing between sync and async op
basing on the flags defined by the driver. Now if a user wants to make
sure that brightness will be set synchronously they have to use
led_set_brightness_sync API.
Signed-off-by: Jacek Anaszewski <j.anaszewski@...sung.com>
Cc: Ingi Kim <ingi2.kim@...sung.com>
Cc: Andrew Lunn <andrew@...n.ch>
Cc: Sakari Ailus <sakari.ailus@...ux.intel.com>
Cc: Pavel Machek <pavel@....cz>
Cc: Stas Sergeev <stsp@...rs.sourceforge.net>
---
drivers/leds/led-class-flash.c | 7 -------
drivers/leds/led-class.c | 2 --
drivers/leds/led-core.c | 24 ++++--------------------
drivers/leds/leds-aat1290.c | 12 ------------
drivers/leds/leds-ktd2692.c | 12 ------------
drivers/leds/leds-max77693.c | 12 ------------
include/linux/leds.h | 14 +++-----------
7 files changed, 7 insertions(+), 76 deletions(-)
diff --git a/drivers/leds/led-class-flash.c b/drivers/leds/led-class-flash.c
index 3b25734..68c3f36 100644
--- a/drivers/leds/led-class-flash.c
+++ b/drivers/leds/led-class-flash.c
@@ -298,9 +298,6 @@ int led_classdev_flash_register(struct device *parent,
led_cdev = &fled_cdev->led_cdev;
if (led_cdev->flags & LED_DEV_CAP_FLASH) {
- if (!led_cdev->brightness_set_sync)
- return -EINVAL;
-
ops = fled_cdev->ops;
if (!ops || !ops->strobe_set)
return -EINVAL;
@@ -316,10 +313,6 @@ int led_classdev_flash_register(struct device *parent,
if (ret < 0)
return ret;
- /* Setting a torch brightness needs to have immediate effect */
- led_cdev->flags &= ~SET_BRIGHTNESS_ASYNC;
- led_cdev->flags |= SET_BRIGHTNESS_SYNC;
-
return 0;
}
EXPORT_SYMBOL_GPL(led_classdev_flash_register);
diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c
index 241059d..8e9ed00 100644
--- a/drivers/leds/led-class.c
+++ b/drivers/leds/led-class.c
@@ -285,8 +285,6 @@ int led_classdev_register(struct device *parent, struct led_classdev *led_cdev)
if (!led_cdev->max_brightness)
led_cdev->max_brightness = LED_FULL;
- led_cdev->flags |= SET_BRIGHTNESS_ASYNC;
-
led_update_brightness(led_cdev);
INIT_WORK(&led_cdev->set_brightness_work, set_brightness_delayed);
diff --git a/drivers/leds/led-core.c b/drivers/leds/led-core.c
index 956c8d8..dc10c54 100644
--- a/drivers/leds/led-core.c
+++ b/drivers/leds/led-core.c
@@ -139,8 +139,6 @@ EXPORT_SYMBOL_GPL(led_set_brightness_nosleep);
void led_set_brightness(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
- int ret = 0;
-
/*
* In case blinking is on delay brightness setting
* until the next timer tick.
@@ -158,20 +156,9 @@ void led_set_brightness(struct led_classdev *led_cdev,
*/
led_cdev->flags |= LED_BLINK_DISABLE;
led_set_brightness_async(led_cdev, brightness);
- return;
+ } else {
+ led_set_brightness_nosleep(led_cdev, brightness);
}
-
- if (led_cdev->flags & SET_BRIGHTNESS_ASYNC) {
- led_set_brightness_async(led_cdev, brightness);
- return;
- } else if (led_cdev->flags & SET_BRIGHTNESS_SYNC)
- ret = led_set_brightness_sync(led_cdev, brightness);
- else
- ret = -EINVAL;
-
- if (ret < 0)
- dev_dbg(led_cdev->dev, "Setting LED brightness failed (%d)\n",
- ret);
}
EXPORT_SYMBOL(led_set_brightness);
@@ -185,12 +172,9 @@ int led_set_brightness_sync(struct led_classdev *led_cdev,
if (led_cdev->flags & LED_SUSPENDED)
return 0;
- if (led_cdev->brightness_set_sync)
- ret = led_cdev->brightness_set_sync(led_cdev,
- led_cdev->brightness);
- else if (led_cdev->brightness_set_blocking)
+ if (led_cdev->brightness_set_blocking)
led_cdev->brightness_set_blocking(led_cdev,
- led_cdev->brightness);
+ led_cdev->brightness);
else if (led_cdev->brightness_set)
led_cdev->brightness_set(led_cdev, led_cdev->brightness);
else
diff --git a/drivers/leds/leds-aat1290.c b/drivers/leds/leds-aat1290.c
index fd7c25f..0ecaf76 100644
--- a/drivers/leds/leds-aat1290.c
+++ b/drivers/leds/leds-aat1290.c
@@ -180,17 +180,6 @@ static void aat1290_led_brightness_set(struct led_classdev *led_cdev,
schedule_work(&led->work_brightness_set);
}
-static int aat1290_led_brightness_set_sync(struct led_classdev *led_cdev,
- enum led_brightness brightness)
-{
- struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
- struct aat1290_led *led = fled_cdev_to_led(fled_cdev);
-
- aat1290_brightness_set(led, brightness);
-
- return 0;
-}
-
static int aat1290_led_flash_strobe_set(struct led_classdev_flash *fled_cdev,
bool state)
@@ -510,7 +499,6 @@ static int aat1290_led_probe(struct platform_device *pdev)
/* Initialize LED Flash class device */
led_cdev->brightness_set = aat1290_led_brightness_set;
- led_cdev->brightness_set_sync = aat1290_led_brightness_set_sync;
led_cdev->max_brightness = led_cfg.max_brightness;
led_cdev->flags |= LED_DEV_CAP_FLASH;
INIT_WORK(&led->work_brightness_set, aat1290_brightness_set_work);
diff --git a/drivers/leds/leds-ktd2692.c b/drivers/leds/leds-ktd2692.c
index 2ae8c4d..7f6758d 100644
--- a/drivers/leds/leds-ktd2692.c
+++ b/drivers/leds/leds-ktd2692.c
@@ -194,17 +194,6 @@ static void ktd2692_led_brightness_set(struct led_classdev *led_cdev,
schedule_work(&led->work_brightness_set);
}
-static int ktd2692_led_brightness_set_sync(struct led_classdev *led_cdev,
- enum led_brightness brightness)
-{
- struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
- struct ktd2692_context *led = fled_cdev_to_led(fled_cdev);
-
- ktd2692_brightness_set(led, brightness);
-
- return 0;
-}
-
static int ktd2692_led_flash_strobe_set(struct led_classdev_flash *fled_cdev,
bool state)
{
@@ -382,7 +371,6 @@ static int ktd2692_probe(struct platform_device *pdev)
led_cdev->max_brightness = led_cfg.max_brightness;
led_cdev->brightness_set = ktd2692_led_brightness_set;
- led_cdev->brightness_set_sync = ktd2692_led_brightness_set_sync;
led_cdev->flags |= LED_CORE_SUSPENDRESUME | LED_DEV_CAP_FLASH;
mutex_init(&led->lock);
diff --git a/drivers/leds/leds-max77693.c b/drivers/leds/leds-max77693.c
index b8b0eec..0eade1ff 100644
--- a/drivers/leds/leds-max77693.c
+++ b/drivers/leds/leds-max77693.c
@@ -510,17 +510,6 @@ static void max77693_led_brightness_set_work(
/* LED subsystem callbacks */
-static int max77693_led_brightness_set_sync(
- struct led_classdev *led_cdev,
- enum led_brightness value)
-{
- struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
- struct max77693_sub_led *sub_led = flcdev_to_sub_led(fled_cdev);
- struct max77693_led_device *led = sub_led_to_led(sub_led);
-
- return __max77693_led_brightness_set(led, sub_led->fled_id, value);
-}
-
static void max77693_led_brightness_set(
struct led_classdev *led_cdev,
enum led_brightness value)
@@ -931,7 +920,6 @@ static void max77693_init_fled_cdev(struct max77693_sub_led *sub_led,
led_cdev->name = led_cfg->label[fled_id];
led_cdev->brightness_set = max77693_led_brightness_set;
- led_cdev->brightness_set_sync = max77693_led_brightness_set_sync;
led_cdev->max_brightness = (led->iout_joint ?
led_cfg->iout_torch_max[FLED1] +
led_cfg->iout_torch_max[FLED2] :
diff --git a/include/linux/leds.h b/include/linux/leds.h
index 8fefe72..804cbe1 100644
--- a/include/linux/leds.h
+++ b/include/linux/leds.h
@@ -45,10 +45,8 @@ struct led_classdev {
#define LED_BLINK_ONESHOT_STOP (1 << 18)
#define LED_BLINK_INVERT (1 << 19)
#define LED_SYSFS_DISABLE (1 << 20)
-#define SET_BRIGHTNESS_ASYNC (1 << 21)
-#define SET_BRIGHTNESS_SYNC (1 << 22)
-#define LED_DEV_CAP_FLASH (1 << 23)
-#define LED_BLINK_DISABLE (1 << 24)
+#define LED_DEV_CAP_FLASH (1 << 21)
+#define LED_BLINK_DISABLE (1 << 22)
/* Set LED brightness level */
/* Must not sleep, use a workqueue if needed */
@@ -60,12 +58,6 @@ struct led_classdev {
*/
int (*brightness_set_blocking)(struct led_classdev *led_cdev,
enum led_brightness brightness);
- /*
- * Set LED brightness level immediately - it can block the caller for
- * the time required for accessing a LED device register.
- */
- int (*brightness_set_sync)(struct led_classdev *led_cdev,
- enum led_brightness brightness);
/* Get LED brightness level */
enum led_brightness (*brightness_get)(struct led_classdev *led_cdev);
@@ -164,7 +156,7 @@ extern void led_blink_set_oneshot(struct led_classdev *led_cdev,
*
* Set an LED's brightness, and, if necessary, cancel the
* software blink timer that implements blinking when the
- * hardware doesn't.
+ * hardware doesn't. This function is guaranteed not to sleep.
*/
extern void led_set_brightness(struct led_classdev *led_cdev,
enum led_brightness brightness);
--
1.7.9.5
--
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